Protocol for the Cognitive Interventions and Nutritional Supplements (CINS) trial: a randomized controlled multicenter trial of a brief intervention (BI) versus a BI plus cognitive behavioral treatment (CBT) versus nutritional supplements for patients with long-lasting muscle and back pain.
Reme SE, Tveito TH, Chalder T, Bjørkkjaer T, Indahl A, Brox JI, Fors E, Hagen EM, Eriksen HR. BMC Musculoskelet Disord. 2011 Jul 7; 12:152. Epub 2011 Jul 7.